Safety mechanism for elevators.



APPLICATION I ILED FEB. 17, v1906.

Patented Oct. 6, 1908.

3 SHEETS-fSHEET 2.

framers P. P. FOLEY, SAFETY'MECHANISM FOR ELEVATORS.

7 APPLIGATION FILED PEB. 1v, 1905. l 900,158. A 4 Patented 0611.6, 1908.

3 SHEETS-SHEET 3.

Iunmyn'. EL,

from/frs l .nixieluna ronny I n'vfploinjq N1 Y.; assieme oFj-oNE-iiainv froeiiARLns w; Henman,

aai 4 i i l 'y i CPYSAFET anisrn for E1evators,owhioh thefollovsfing lis a'fuiLelearfandjeicaet desoriptifonjrneY it hiawatha@ fi, remita' nomia invented a new'and improved Safety' Mech- M y invention relates 'to ineehanisms'for arresting the. movement ofl an eleyatorjwhieh has, from anyteause, rattained an eXee'sslve speed.v I Its .principalf-objeots ariete-provide terferenoewith its automatioiaotion- Y i Reference 1s to be had totheaccompany-V positive -anc' "auto'matic means for'q'uiokly,

` ringing this safetymeehanism'into position ism to'a'lso be inanuallyoperated withoutinj for application. and then', by la, eontnuatgion l ."ofthis movement, more'gr'adually eij'eoting lltsengagen'iena and to Lenable themeohan-z --ing drawings forming a partof this specification', `in Whieh similar characters of reference" '1. indicate corresponding'parts in all the Views. Figure `1 is af broken sectional elevation ofplan/iew of the'safetym'echanism;' arts'- being broken await? and the 'gudelrailsjbeing 4 .sbown' in'seotion'; "3 is s a similar Viewv 'of one end of the safety mechanism but Wlth the*v jaws brought into proximity' with the `raii ;l Fig.l` 4 shows the same elem'entsi'n-the posi;

` tion for' effecting engagement;lge..l 5' and-:6

' lare Vertical longitudinal sections on the" lines 5.- 5 oFigjZ and.6'--6'of' Flg. 4,l respec-l tively ;'Fig. .7 is a transverse sectional detail .I an tiene@ vez of Fig.' 5;; Figss and. 9- shew, --in "nde1e\"ation, the c'oactin'gportions ofthe'- itsfmore .closely'fassooiated elements.

4 Upon the walls-of a shaftA are sup "the safety mechanism: ,In this 'shaft moves aaai- B operated in any usual or o onvenient manner 'and having across its lower-portion',

beams b, spaced Sonieidistance`-y apart. These beams serve toi supportfthemore esr sential elements of my improved 1 neohan1s1`n,"

whichis; illustrate-dv 'asI substantially- 'duplithe usuall vertical guidenails it, e, Wblc may also"ser,\ e asfthe iXed'oontaot members of cated atopgosite 'sides o ftheoarffor eo eraf' Y mndimfmsn 'Foa nuances Patented-oct. e, 1 -eos.

rotatablemembeifconnnon to` both,fbut"one iWill lbe particularly defscli bed` Consideringf -l' then;v one'sideofthe oar; there is attached to the ends of the' beams adjacent to ytine' guideg to avoid interference with thefinovablefporf .prises'abody 26; from opposite sides of iivhich :levers and being suppo'rtedfand gui edt 'ereing-"Whi'oh -are rotatably 4mountedrolls Y28 suitable distanoefroni `the rail," by 'a spring 28a connecting studs 2 8b depending from. the

axial' opening,'w hi 'ol istbreaded at 29, ai`1d 1 Withthis threadooacts athreaded portion 3() of. anf"aotuating member or s leeve`3'1 This oppositeeitensi'ojns 33,k 33', eac of which has an inclined Contact" oxfj Camif-face 34 Vwhich is,

In'ents are theV same," save that l their'inelined .i threadedor foam' portions`- maybe reversed to ."itizen-.of the-United States,v a'daresijdentof i 's eure 4sixgn-ilar'operating movements from a rail a pIa'teZO otawayat its eentral portion tions of themeehani-sfni; Upon this-plate-isf ber or jaw 24"; the fae'fl'a; which-cooperates' .in effect, 'a portion' of'asorewfthreadofmueh greater 'pitch than .that formed 'upon the sleeve'at 30,' Each of these camfaces leads toaface'34*l situated substantialiyparaliel "to 'the heado'f the sleeve and terminates in a verticaistop-face 3 5. i Through 'theoperat- .ing Ine-rnber` and sleeve. extends-an loperating fshaft v36"-iriouited to .rotatein bearings carried by bars 373' Sextending between the b'eains shaft projects' beyond the sleevejandlis 'squared at 38to11eoeie :t1-Mar 39', W'hieh, 'by its squared engagement, 4is co`n.

veure `inore eiieetive"engager'n'ent.A The'innerl .'-adjaeentedges 'of the llevers are inclined at 25," they onverginginwardly'and furnishing.

Contact ',surfaoes 'Between these. faces is"` extend 'pairs of-arrns 2 7; '27 overla. ypin the' `on". Between the-,arms are lateralV reeessesgg whieh coactl witii'thecontaotfaoes 25 of the eyersand'serve mirada@ Itnyfriaion be-L .tween .these elements The levers" may, ybe Y drawn into cont ac t with" these rolls 5 they "be-f 'i ing .thus heid with. the jaws: separated for af under side ofi the ,levers near Vtheir vext rer'ni-v ties-f' In-the operating' ineinber'is shown an'go sleeve hasfat -itsffopposi'teor uter' end, aj v headi? overhanging the adj aoent face ofthe operating member and being ii'vi'ded-` with' of the shaft.

strained to rotate with theshaft while being permitted longitudinal adjustment thereon. ts position with respect to the outer end Iof i the shaft is fixed by a nut 40, which, with alock-nut 41, is carried by the threaded end 42 From the innerside of the col# i lar 39 ro'ect a air of se arated arms 42a ,P l Il; P

which coactv wit sleeve.

Pivoted upon the outer face of the operatthe contact-faces of the ing member is' a vawl 43 movable between inner' and outer s yop-pins 44 and 45 and in its'inner position engaging 'a projection 46 provided at one side of one o the arms 42 a,

from the periphery ofthe sleeve-head, this preventing the rotation' of the sleeve.- To

disengage thepawl from the'projection and allow the sleeve to rotate, a rojection 47 is and'when it revolves with the arm, contacts with a 'pin 48 extending, laterally from the `pawl, forcing it outward beyond the projection 46. Fixed upon the shaft 36 near its center'isa drum 49, which, in the present in stance, is shown as tapered from one end to the other. About this drum, between op osite heads 49a, is wound an operating ca le 50 which has one end -attached to the drum and' then passes upwardly over a pulley 51 mounted upon a bracketj-51 a at the top of thel shaft.;v then downwardly over a pulley 52 rotatable in abracket 52"L fastened at the b ottom of the shaft,'and finally upwardly, where its other end is secured to' a stop or controlling-button 53 fixed on the cable between the drum and pulley 51 and normally located betweenj'arms 54'v projecting from a bracket 55 which is shown as mounted upon the top of the-car. Coacting with'each of the arms 54 is a pivoted arm 56 which is normally'heldin proximity to the companion-arm by aspring 57 carried by the car. The button is preferably provided with inclined ends 58 resting.v in similarly formed recesses between the arms so that, if the movement of the cable is.

arrested, the button will force its waybetween the. arms, thus' releasing its engagement with the car.

member iixed upon the bracket.

' y .Under rates of travel of the 'car lnot much exceeding the normal the rip member 62 will be out of Contact wit the operating I cable and 'the stop-button held between its cooperating arms'will move the cable with .the car, thf1s passin over the vpulleys 'at the top and bottom of t Y e shaft without rotating the drum and operating-shaft; At thistime lthat they are not liable to come into contact Carried by the bracket v 51 isa governor 59 of any convenient ty e, which is connected' to the shaft of the pul eyA `the arms of the collar 39 are at the lower ends.

of the cam-faces upon the sleeve and the pawl is in engagement with the projection 46. This allows the operating member to occupy its extreme outward position, it be- 7'0 ing held there by the .pressure of the leverinclines under the tension of the connecting spring, which also holds the lever-jaws separated from the guide-rail by such a distance with it during the movement of the car. If the car falls or attains an undue velocity the governor aetsto grip the o erating cable between the members 62 an 63, thus holding it against movement with the car. The 30 operating-button then forces its way between the arms 54 and 56 ,.pressinor the' latter j to onel side and-permitting the cable to rotate -the drum,- `the direction o f its inclination giving it a graduallydecreasing speed. This causes the arms '42 to rideu the inclines of the actuating-sleeve, -whic 1 is held 'against rotation' by the pawl and therefore forces both. the actuating member and operating member longitudinally of the shaft and the latter against the' levers, which are quickly swung suiciently uponu their ful. crums to brin he jaws into close proximity with theV rai- This having been accomplished during a comparatively short travel of the, car, the arms reach the stop-faces of the sleeve and at this time theirproj-ection strikes the pawl-pin, moving it outward and releasing the projection 46. The sleeve is now free to rotate with the arms andthis turns itin the operating member, the threaded engagement causing the latter to act as a nut, it moving longitudinally but at a much less speed,'thus slowly forcing the lever-arms` from one another andthe jaws into enga e- 1m;- ment with the rail. The pressure of' t e jaws. increasing as the car advances graduyally brings it to rest.. lt is also desirable that the 'operator shall be' able to manually l stop the car independently-.of its ordinary starting and stopping mechanism-in event of its becoming uncontrollable. For this urpose each operating member has proj ectlons '64, here shown'as two in number and situated upon its innerface at each side of the shaft. To these projections, at one side of the car, are articulated links 65 which, at their inner ends, are ivoted to arms 66 de` pending from a rock-s aft 67 which is shown as journaled in the beams b. Upon one end of the rock-shaft is al lever 68 projecting through the car-floor and having. latch mechanism 69 by means of which it may be locked Ain position by engagement with a toothed sector'70. An arm 70a1on the shaft 67 is 125 connected by a link 71 to an arm 71 fixed upon a rock-shaft 72 at the o positeside of thecar, and this shaft 72 also lias xed uponit and depending beneath the beams, slmilarly to the arms 66, rock-arms 73 which are 130 Las 'carinto close l 0- beenfmoxfed finto' close proximity with the l rails", and u' n -m'aticallysetzupon the. railsto 4s t o o the'fc'ar,

they'may libe.' 'suitable radin fo "of the lar exizof, 'tively 'sligl t -andnlar' Inovem'entfof the shaft joined links 74. to :theprojections 64 from dott and when f it reaches afposition'substantial y to stop'or'control 'the cali are ineffective anil t l pee'd," the 'safety- 4mechaliisrn still? 'be'sfree to4 Work indep endently.; 3 'After the :jaws havebeen'ant' aptsassuine their? normal positionsi proyided` fol'j without "interfqefIf--4 automatic' operation. 'i Having thus 'described my inyentioml t- 1n amber; of' a" movable contact*member-carried 'by .the can, an' o erating' membcrfasso'ciated; with the "'ofier'ating 'fried bythe@ .es ire.' wsereby Letters" contact member varried by tliefcfiryan Opern f 3.` Th'ecombinatlonWith an 1 elevatorecar anda fixedcontactfmeniben; ofS-akmovla'ble ating nieniber @forlthe oai'co'nta'ctl. mein erg 85 and-:a longitudinally lmovablefand 'rotamable".I 'actuatingniemberfhaving tli- Ieadedv engagementjwithtlieff operating-1Iner'ril er '.y4 h A; .Tlieilombination with an elevator-"carv and alxed Contact; member, of a movable' 90 contact-.member carried'b'y thec'anan ope'rla I ating 'member -fon the caiy c'ontactinember af longitudinally movable Sand :rotatable actumernbeg ands nieaIiiS' for -rethainirig t e a'ict'u- 95 ating' member against? rotation "durngil-{its 4.longitndi nal movement; fi

5, 'The combinationwithan elevatorcanland a Aiixecl contact-* member; ofamoyable contact -linember carxjiedbyf thehcaig van yoper- 10o atinv "member foi'4 the lcar'contact I n'eInbfer; a "longltutlinallymoyable fand rotatable' actu? longitudinally'moyabiegjam]:"rotataile act-uf' 12o er's'rroizn' in gftheshaft an 4 "coactingwith'T1307 the car Contact membenan actuating memberhavingthreaded engagement with the operating member and being provided With an inclined face, and a member rotatable pith the shaft and coacting With the inclined ace. l

9.1The combination with an elevator-car and a fixed contact member,gof a movable contact member carried by the car, a shaft journaled u on the car, an o erating member surrounding the shaft anccoacting with the 'car contact'. member, an actuating member having threaded engagement with the operating memberand being rovidedwith acam-face and a stop-face, an a member rotatable With the shaft and coacting with the yfaces of the actuating'member.

10. The combination with an elevator-carl and a fixed contact member`, of-a movable 20 en' and'coacting with the faces of the actuating member and having a portion for engagelInent'vvith the awl.

11,4 The com mation With an elevator-car and a Afixed contact member, of a movable contact member carried by the car, a .shaft 1 journaled upon the car,'-an operating member surrounding the shaftand-coacting with the car -contact member, an actuating member having threaded 'engagement with the 4o operatingmember and being provided with an `inclined face, a member rotatablel with the shaft and coacting With the inclined-face', and means for effecting anadjustmentof the last-named memberupon the shaft.

" car and a-fixed contact member, of levers l2. The combination with an elevatorp ivoted upon the car andextendingl upon variation is secure threaded portion, a sleeve surrounding the shaft and being provided With a thread engaging that of the operating member and with cam and sto -faces, and a collar rotatable withA the sha t and-having an arm coperating With the sleeve cam and stop-faces.'

14. The combination with an elevator-car and a fixed contact member, of levers pivoted upon the car and extending upon opposite sides of the contact member, a shaft extendling in proximity With the levers, means for rotating the shaft, an operating member associated with the levers and having a threaded portion, a sleeve surrounding the shaft and beingprovided with a thread engaging that of the operating member and with contact-faces, a paWl mounted upon `the sleeve and which may engage lthe operat- .ing member, and a collar rotatable with the shaft and having an arm cooperating with the sleeve contact-faces, said arm having a projection Which may coact with the paWl.

15. The combination with an elevator-car and a fixed contact member., of levers pivoted 'upon the car and extending upon opposite sides of the contact member,- a shaft extending in proximity With the levers, means for rotating the shaft, an operating 'member associated with the levers and having a threaded portion, a sleeve surrounding the shaft and being .rovided with a thread engaging that of t e operating member and with contact-faces, and a'collar. rotatable with the shaft and being longitudinally movable thereon and having an arm coperating with the sleeve contact-faces.

16. The combination With an elevator-car and a fixed contact member, of a movable contact member carried by the car, a shaft journaled upon the car, a tapered drum fixed u pon the shaft and operating cables' surrounding the drum, and means for moving the car contact member actuated by the shaft at a varying s eed, a portion of which by the taper of the drum, said means comprising a normally engaged sleeveand releasing devices therefor ermittingthe sleeve to rotate in and move All() o 'posite sides of the contact member, va 'S aft extending in proximity With the levers, 50 means for rotat' the shaft, -an operating member associate With the levers and havongitudinally With-the operating member. 17. The combination with an elevator-car and a fixed'contact member, of levers pivoted 1 15 l ing a threaded portion, a sleeve surrounding the shaft and being provided with a thread engaging that of the operating member and 55 with contact-faces, and a collarl rotatable `With the-shaft-and havin an arm. coperating ,with the sleeve contactaces.

The combination with an elevator-car and a fixed contact member, of levers pivoted 6'0 `upon-the car andextending upon op osite' sides of the contact member, a sha t extending in proximity with the levers, means for rotating the shaft, an operating member.

associated with -the levers and having a l .upon the car and extending-upon opposite sides of the contact member, automatically movable means for operating the levers, a link .pivoted to the operating means, and an operating lever fulcrumed u on the car and being connectedwith the lin the link havjoins.

18. An elevator car, a clamping device ing a slotted connection with the elements it therefor, and a differential screw having a high pitch thread and a lovv pitch thread for actuating the clamping device.,

19. An elevator car, a clamping device M/ff" 152 www;

therefor,' ahigh pitch lscrew and a 10W pitch screwsi. arranged to actu ate. th

img inning 212.6 "In a. vsafety device :fo e1evators`,'1the i -1coinlcination offa car, ygilides over v'Which the" caris adapted to run, a clamping f deviceon `the v can;` and adi,fiererltialnV 'screwhaving a vhigh pitch/ty read and 1a lowpitch-'threaxh' 'device quicklyagainst the guides and then to'` tighteniton the-guides;` r i-l, '23.In'a :sa'l ty device `for elevators;"the combination of a year, vguidesjo'ver which' :the

" .car is! adapted tornfa clamping de vice--onjy jthecarya ighpitc -clampingdevice onthei'guidesf; means for,

the cart; andfa differenti high p itchserevsfandrv screw yarranged `tol mov e; quickly agairst 'theguids'findithnslowly an Wi ampingfdsfieefon" gains clamplng devcejonffthe-Jguid for actuating thelscrew Y 125. Ima, safety'd combination of aj @er is @da .ted to' t.

crew?4 arranged :to move the; crzlampihgl device `agaiilst the guidesa 10W` pitch screw1 arranged to tightenath'e clamping j device onthe guides', and "means.for81217111'atingA 26.1 1In a safety{de v'iceifor;elevators,\thev combination of a car;` gides over which the car 'is ada v'ted ,te rung. aA 'c1ampingdevice-:o the car, a1 ighpitchscrew-arrangedto' the Vcl'arnpliig ldevice yagainst the videS, low pitch screwv farrang'edf tof` tigiien the"clamping:devieagains the, al?, a high pitch ,Screw arranged: www@ l y Y thellidespalow pitch screw arrangedtotighten 't ye clamping Ldevice `10121111112 guides,"r and'ineans for actuating threa an .Clamp the s'creWS by the motion of the car when the Scar speed. Beachesapredetermined 4fliliniif 1 551,28. TheiGOIlbinatongWith an elevalt'orier, Aguides whichfthe carfis adapted tofinove, g a clamping .de screw arrangdito'lhvegthe-eclampinggdevice exon). the ycar,` aihigh pitch by the caraillti arranged@ toE actiiateffsthe 'the fun

right .and left hand die'r'ential screws each i '530. In anelevato Safetydevice;,thec'orn ifbina'tii'on? of a guides therefor, r'cl'ai'rn ing alf; devicesadaptedl to engage-I'Withf the' f'gide, right-and left hand dierentiai `screws' 'Peach having a VVhighfpitch thread and alow'f pitch arranged? to 1 move, Athe clamping devices; quickly-.against thel guides 'andtoV tighten the 'clamping 1 devices on the-guides.

l'j llvln anfelevat'onsafety device, thec'ombination of; afcar,4 guides thereforgvclam Ping jdevice's adapted"toi'engagegthe guides, fright andi-i` left hand" screws; 4arran'g"ed f te@ 4move the 1;, lamping devices ,qiiicklyfag'ainst the'gguides, fandjfightl and lleftsuhan'd screwszo low-.pitch arr nged to 'tighten the clamping: devices'fon car,y guides therefor,4 clam the". guides," and "s'crews. 'l

rneans for actuatingc the .Y "(33.y Infan' elevatorrsafety'device; thecom'- bination `of apar-,'- guides thereforx clamping de yce sadapted to. engage the "guides, nght `fthandscrewsf'arranged to move the devices, quicklyA against the guides,

ranged" to"tightenthe clamping devices on the guides, and-@a1 qverrorarranged to actuv ate `the screwskuwi reaches a predeterminedlinutp;nu

en fthggspeed; of the-clan'` 34.` In an elevator'safety devicwthe ing bmatlon of *aicary gmdesgftherefonsclam f devices adapted toengage the guides,` rightA and 'left hand screws arranged to move the yclampingdeiffices qicklyfagainst the gilide's, iig-ht and left; hand `screws of' low pitch arranged to tighten :the clamping, devices onf.

`the guides, a lgovernorfgarranged' toaactuate` the 'screws when thespefed ;.offtheccal 1eaches a predetermin'ed flilnit, nd cane for'actfu ing thescrews by hand: A

l 3 2.` inanelevator safetysdevice, the com- "bination of; a

` *devicesl a( 1apted:.ftoy engage the guides,l nght and; left handf. s'crews arranged vto f move the clampingidevicesiquieklyagainsttheguides, 1 right fand left@ bami.,` Screws of 10W pitch 1arranged 'tot .tightenfjthe' vclarnping 'device'sfon 35. In an elevator safety device, the coinbination of a car, guides therefor, clamping devices adapted to engage the guides, right and left hand screws arranged to move the `clamping devices quickly against the guides. right and left hand screws of low pitch ar'- ranged to tighten the clamping devices on the guides, and means for actuating the screws by the movement of the car.

f v 36. In an elevator safety device, the combination with hoistway rails, of friction inembers adapted to engage said rails, a sha ftliaving portions provided with'threads of the same kind or direction but of different pitch,

means connecting said threaded portions to` said friction members, and means for auto-- matically rotating the shaft.

37. In `a `Safety device for elevators, the combination'with hoistway rails, of friction members 'ada ted to engage said rails, a shaft having differentially Vthreaded portions, means connecting said threaded portions to the said friction membersand means for automatically rotating the shaft.

38. In an elevator safety device, hoistway rails, friction members adapted to engage sald rails, and a differential screw to operate said members.

39. In an elevator safety device, hoistway rails, gripping jaws ada ted to bite against opposite sldes of said rai s, and a differential `screwfor operating said jaws.

40. In an elevator safety device, rigid rails for'the hoistway, grip ing jawsadapted to be mounted on a car an engage said rails, and a differential screw to operate said jaws.

41. In'a safety device for elevators, the combination with hoistway rails, of gri ping jaws adapted to engage said rails, a di erential screw to operate said gripping jaws, and

means for automatically operating 4said screw.

42. In a safety device for elevators, a

brake to stop the car, longitudinally o erat-'h ing means for operating the brake, an positive means for actuating said longitudinally operating means at different speeds to first-` cause the brake to operate quickly and then slower and more powerfully.

-k 43. In a safety device for elevators, a brake, a longitudinally o erating member to operate said brake, a rum, and positive means actuated by the drum to firstl give the brake actuating member. a quick initial movement and then a slower and more powerful movement' to stop the car.

-and more powerfully, and means for actuating the brake by hand.

46. In a safety device for elevators, a brake, a member to operatev said brake, a drum, means actuated by the drum to first give the actuating member a quick initial movement and then a slower and more powerful movement to stop the car, and means for operating the actuating member by hand.

47. In a safety device for elevators, the ombination of a brake, a brake actuating member, rotatable means to actuate the brake actuating member, said rotatable means being adapted to first give a quick initial movement to the brake actuating member and then a slower and more powerful movement.

4.8. In a safety device for elevators, the combination of a brake, a brake actuating member, .rotatable means to actuate the brake actuating member, said rotatable means being adapted to first give a quick initial movement to the brake actuating member and then a slower and more powerful movement, and means for operating the brake by hand.

49. In a safety device for elevators, a braking device therefor, and rotatable means havmg different surfaces for actuating the braking device, one surface being adapted to give actuating the braking device. A

51. In a safety devicefor elevators, a braking device therefor, rotatable means having different surfaces for actuating the braking device, one surface being ada Yted to give a quick initial movement to the raking device and another surface beingadapted to give a slower and more powerful movement to the braking device and means for operating the braking device by hand.

52. In a safety device for elevators, a braking device therefor, rotatable means having different surfaces for actuating the'braking device one surface being ada ted to give a' quick initial movement to the raking device and another surface being adapted to give a slower and more powerful movement to the braking device, and a drum for controlling the action of the rotatable means. i

braking device,l and means for automatically 53. In a safety device foi' eleviars,y vthe l n testimony lwhereof I have signed my cembnation' of aJ ear, guides for'the ce1', a, name to thisspecication'n the presence of clamping device for thecar, rotatable means for ositivelymoving the clamping device 5 quie y to the guides,'andadditiona1rotate-1 ble'means fOr tightening the clamping device 011 the guides.

twolsbscribing Witnessee.

. PATRICK F. FOLEY. Witnesses JNO. M. RITTER, SYLYANUS H. COBB; 

